San Francisco 49ers wide receiver Michael Crabtree (15) scores on a 49-yard touchdown reception against the Arizona Cardinals during the second quarter of an NFL football game in San Francisco, Sunday, Dec. 30, 2012.

49ers Darcel McBath, (28) Perrish Cox, (20) , Anthony Dixon, (24) and Donte Whitner, (31) celebrate at the end of the game, as the San Francisco 49ers beat the Atlanta Falcons 28-24 to win the NFC Championship game on Sunday Jan. 20, 2013, at the Georgia Dome in Atlanta Ga.

Half the lights go out in the third quarter of Superbowl XLVII between the San Francisco 49ers and the Baltimore Ravens at the Mercedes-Benz Superdome on Sunday February 3, 2013 in New Orleans, La.

Photo: Carlos Avila Gonzalez, The Chronicle

Half the lights go out in the third quarter of Superbowl XLVII...

Half the lights go out in the third quarter of Superbowl XLVII... Photo-4155523.56436 - SFGate

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Quarterback Colin Kaepernick (7) after scoring a touchdown in the third quarter of the San Francisco 49ers game against the Green Bay Packers in the NFC Divisional Playoffs at Candlestick Park in San Francisco, Calif., on Saturday January 12, 2013.

Kendall Hunter squeezes into the endzone during the San Francisco 49ers victory against the New York Jets. On Sunday, the San Francisco 49ers beat the New York Jets, 34-0, at Metlife Stadium in Rutherford, New Jersey.

Photo: Bryan Thomas

Kendall Hunter squeezes into the endzone during the San Francisco...

Kendall Hunter squeezes into the endzone during the San Francisco... Photo-4155526.56436 - SFGate

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San Francisco 49ers Quarterback Colin Kaepernick (7) celebrates with coach Jim Harbaugh after a touchdown in the third quarter of the San Francisco 49ers game against the Green Bay Packers in the NFC Divisional Playoffs at Candlestick Park in San Francisco, Calif., on Saturday January 12, 2013.

Linebacker Aldon Smith (99) and the defensive line during the first quarter of the San Francisco 49ers game against the Atlanta Falcons in the NFC Championship game at the Georgia Dome in Atlanta, GA., on Sunday January 20, 2013.

Photo: Michael Macor, The Chronicle

Linebacker Aldon Smith (99) and the defensive line during the first...

Linebacker Aldon Smith (99) and the defensive line during the first... Photo-4155528.56436 - SFGate

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LaMichael James hurtled some defensive players during a fourth quarter run back from a punt. The San Francisco 49ers beat the Atlanta Falcons 28-24 to win the NFC title and advance to the Super Bowl Sunday January 20, 2013.

Photo: Brant Ward, The Chronicle

LaMichael James hurtled some defensive players during a fourth...

LaMichael James hurtled some defensive players during a fourth... Photo-4155529.56436 - SFGate

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Safety C.J. Spillman recovers a fumble by Jeremy Ross during the second quarter of the San Francisco 49ers game against the Green Bay Packers in the NFC Divisional Playoffs at Candlestick Park in San Francisco, Calif., on Saturday January 12, 2013.

Tight end Delanie Walker (46) catches a long pass in the second quarter of the San Francisco 49ers game against the Green Bay Packers in the NFC Divisional Playoffs at Candlestick Park in San Francisco, Calif., on Saturday January 12, 2013.

Photo: Brant Ward, The Chronicle

Tight end Delanie Walker (46) catches a long pass in the second...

Tight end Delanie Walker (46) catches a long pass in the second... Photo-4155531.56436 - SFGate

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49ers coach Jim Harbaugh yelled at officials for a holding call on the missed catch by Michael Crabtree in the endzone in the fourth quarter. The Baltimore Ravens defeated the San Francisco 49ers in Super Bowl XLVVII 34-31 Sunday February 3, 2013.

Jim Harbaugh, head coach of the San Francisco 49ers, looks on in disappointment after a score by the Seahawks during the first half of a game Sunday, Dec. 23, 2012, at CenturyLink Field in Seattle, WA. Seahawks led 28-6 at the half.

Photo: JORDAN STEAD, Special To The Chronicle

Jim Harbaugh, head coach of the San Francisco 49ers, looks on in...

Jim Harbaugh, head coach of the San Francisco 49ers, looks on in... Photo-4155533.56436 - SFGate

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Colin Kaepernick #7 celebrates a touchdown with Alex Boone #75 and Joe Staley #74 of the San Francisco 49ers during a game against the New York Jets at MetLife Stadium on September 30, 2012 in East Rutherford, New Jersey.

Wide receiver Randy Moss #84 of the San Francisco 49ers celebrates after scoring a touchdown with quarterback Colin Kaepernick #7 and guard Mike Iupati #77 in the first quarter against New England Patriots at Gillette Stadium on December 16, 2012 in Foxboro, Massachusetts.

San Francisco 49ers fans celebrate a 15-yard touchdown run by quarterback Colin Kaepernick during the fourth quarter of Super Bowl XLVII against the Baltimore Ravens at the Mercedes-Benz Superdome on Sunday, Feb. 3, 2013, in New Orleans.

Baltimore Ravens tight end Ed Dickson (84) makes a one-handed catch as San Francisco 49ers cornerback Tarell Brown (25) defends during the second quarter of Super Bowl XLVII at the Mercedes-Benz Superdome on Sunday, Feb. 3, 2013, in New Orleans.

San Francisco 49ers head coach Jim Harbaugh makes a face on the team bus after arriving at the Louis Armstrong International Airport for the NFL Super Bowl XLVII football game Sunday, Jan. 27, 2013, in New Orleans.

San Francisco 49ers quarterback Colin Kaepernick is sacked for a 7-yard loss by St. Louis Rams outside linebacker Jo-Lonn Dunbar (58) and defensive end William Hayes, right, during the first quarter of an NFL football game Sunday, Dec. 2, 2012, in St. Louis.

49ers coach Jim Harbaugh following the Niners win against the Green Bay Packers in the NFC Divisional Playoffs at Candlestick Park in San Francisco, Calif., on Saturday January 12, 2013. 49ers win 45-31.

Photo: Wes Sumner, Special To The Chronicle

49ers coach Jim Harbaugh following the Niners win against the Green...

San Francisco 49ers wide receiver Ted Ginn is unable to pick up a fumble by quarterback Colin Kaepernick during the second half of an NFL football game against the St. Louis Rams, Sunday, Dec. 2, 2012, in St. Louis. Rams' Janoris Jenkins recovered the fumble and took it in for a touchdown.

Wide receiver Michael Crabtree (15) catches a touchdown pass from Quarterback Colin Kaepernick (7) during the second quarter of the San Francisco 49ers game against the Arizona Cardinals at Candlestick Park in San Francisco, Calif., on Sunday December 30, 2012.

A flag is seen outside the plane carrying the San Francisco 49ers as they arrive at the Louis Armstrong International Airport for the NFL Super Bowl XLVII football game Sunday, Jan. 27, 2013, in New Orleans.

Photo: David J. Phillip, Associated Press

A flag is seen outside the plane carrying the San Francisco 49ers...

A flag is seen outside the plane carrying the San Francisco 49ers... Photo-4155549.56436 - SFGate

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Markus Merlino, left, kisses his husband Alan as they celebrate the San Francisco 49er scoring in the third quarter against Baltimore Ravens in the Super Bowl, Sunday Feb. 3, 2013 at the Hi Tops, the first gay sports bar in San Francisco, Calif.

Running back LaMichael James (23) is brought down by the San Francisco 49ers game against the Green Bay Packers in the NFC Divisional Playoffs at Candlestick Park in San Francisco, Calif., on Saturday January 12, 2013.

Photo: Carlos Avila Gonzalez, The Chronicle

Running back LaMichael James (23) is brought down by the San...

Running back LaMichael James (23) is brought down by the San... Photo-4155551.56436 - SFGate

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San Francisco 49ers head coach Jim Harbaugh hugs Vernon Davis after the NFL football NFC Championship game against the Atlanta Falcons Sunday, Jan. 20, 2013, in Atlanta. The 49ers won 28-24 to advance to Super Bowl XLVII.

The San Francsico 49ers vs. the Arizona Cardinals at Candlestick Park in San Francisco on Sunday, November 30th, 2012.

Photo: John Storey, Special To The Chronicle

The San Francsico 49ers vs. the Arizona Cardinals at Candlestick...

The San Francsico 49ers vs. the Arizona Cardinals at Candlestick... Photo-4155554.56436 - SFGate

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San Francisco 49ers running back Frank Gore Kaepernicks while celebrating with Quarterback Colin Kaepernick (7) after running in a touchdown in the third quarter of Superbowl XLVII between the San Francisco 49ers and the Baltimore Ravens at the Mercedes-Benz Superdome on Sunday February 3, 2013 in New Orleans, La.

Alex Smith walks along the sidelines in the fourth quarter in what could be his final regular season game for the 49ers. The San Francisco 49ers played the Arizona Cardinals at Candlestick Park in San Francisco, Calif., on Sunday, December 30, 2012, in the final game of the 2012 season.

Photo: Carlos Avila Gonzalez, The Chronicle

Alex Smith walks along the sidelines in the fourth quarter in what...

Alex Smith walks along the sidelines in the fourth quarter in what... Photo-4155556.56436 - SFGate

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Frank Gore hugs Denise Debartolo York in the final minutes of the game against the Arizona Cardinals. The San Francisco 49ers played the Arizona Cardinals at Candlestick Park in San Francisco, Calif., on Sunday, December 30, 2012, in the final game of the 2012 season.

Photo: Carlos Avila Gonzalez, The Chronicle

Frank Gore hugs Denise Debartolo York in the final minutes of the...

Frank Gore hugs Denise Debartolo York in the final minutes of the... Photo-4155557.56436 - SFGate

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Jim Harbaugh talked with Frank Gore near the end of the game. The San Francisco 49ers defeated the Detroit Lions 27-19 at Candlestick Park Sunday September 16, 2012.

Photo: Brant Ward, The Chronicle

Jim Harbaugh talked with Frank Gore near the end of the game. The...

Jim Harbaugh talked with Frank Gore near the end of the game. The... Photo-4155558.56436 - SFGate

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San Francisco 49ers Quarterback Colin Kaepernick (7) during the San Francisco 49ers game against the Arizona Cardinals at Candlestick Park in San Francisco, Calif., on Sunday December 30, 2012.

Photo: Stephen Lam, Special To The Chronicle

San Francisco 49ers Quarterback Colin Kaepernick (7) during the San...

New York Giants wide receiver Victor Cruz (80) holds the ball against his helmet while catching a pass in front of San Francisco 49ers cornerback Carlos Rogers (22) during the second quarter of an NFL football game in San Francisco, Sunday, Oct. 14, 2012.

Jack and Jackie Harbaugh, parents of Baltimore Ravens head coach John Harbaugh and San Francisco 49ers head coach Jim Harbaugh, kiss during a news conference, Wednesday, Jan. 30, 2013, for NFL football's Super Bowl XLVII in New Orleans. Their sons will be coaching against each other in the Super Bowl on Sunday.

Little Frank looked at his father Frank Gore while waiting for an interview. The San Francisco 49ers beat the Atlanta Falcons 28-24 to win the NFC title and advance to the Super Bowl Sunday January 20, 2013.

Photo: Brant Ward, The Chronicle

Little Frank looked at his father Frank Gore while waiting for an...

Little Frank looked at his father Frank Gore while waiting for an... Photo-4155565.56436 - SFGate

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San Francisco 49ers quarterback Alex Smith (11) is tackled by St. Louis Rams linebacker Jo-Lonn Dunbar (58) on a four-yard gain during the first quarter of an NFL football game, Sunday, Nov. 11, 2012, in San Francisco. Smith had a concussion from the play.

New Orleans Saints wide receiver Marques Colston (12) is upended by San Francisco 49ers safety Dashon Goldson (38), causing an interception returned for a touchdown, in the second half of an NFL football game in New Orleans, Sunday, Nov. 25, 2012.

Colin Kaepernick runs in for a touchdown in the third quarter of the San Francisco 49ers game against the Green Bay Packers in the NFC Divisional Playoffs at Candlestick Park in San Francisco, Calif., on Saturday January 12, 2013.

Photo: Brant Ward, The Chronicle

Colin Kaepernick runs in for a touchdown in the third quarter of...

Colin Kaepernick runs in for a touchdown in the third quarter of... Photo-4155568.56436 - SFGate

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New York Giants wide receiver Victor Cruz (80) is flipped over by San Francisco 49ers cornerback Carlos Rogers (22) during on an incomplete pass during the second half of an NFL football game in San Francisco, Sunday, Oct. 14, 2012.

A fan dressed in homage to Michael Crabtree celebrates the Niners win in the stands following the San Francisco 49ers game against the Arizona Cardinals at Candlestick Park in San Francisco, Calif., on Sunday December 30, 2012.

49ers wide receiver Randy Moss is congratulated by 49ers guard Alex Boone after scoring a touchdown against the Patriots in the first quarter of their game at Gillette Stadium on Dec. 16, 2012. The 49ers won, 41-34.

Cornerback Perrish Cox (20), Linebacker Tavares Gooden (56), Running back Rock Cartwright (28) and Safety C.J. Spillman (27) wait for instructions on the sidelines during Superbowl XLVII between the San Francisco 49ers and the Baltimore Ravens at the Mercedes-Benz Superdome on Sunday February 3, 2013 in New Orleans, La.

San Francisco 49ers running back Frank Gore (21) scores on a one-yard touchdown run in first-quarter action against the St. Louis Rams at the Edward Jones Dome in St. Louis, Missouri, on Sunday, December 2, 2012. The St. Louis Rams defeated the San Francisco 49ers, 16-13.

San Francisco 49ers wide receiver Michael Crabtree (15) celebrates after scoring a touchdown during the first half against the Green Bay Packers at Candlestick Park in San Francisco, Calif. on Saturday, January 12, 2013.